CVE-2025-55131: A flaw in Node.js's buffer allocation logic can expose uninitialized memory

Description

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

nodejs node

Default version status: unaffected

20.19.6 to ≤ 20.19.6affected
22.21.1 to ≤ 22.21.1affected
24.12.0 to ≤ 24.12.0affected
25.2.1 to ≤ 25.2.1affected
4.0 to < 4.*affected
5.0 to < 5.*affected
6.0 to < 6.*affected
7.0 to < 7.*affected
8.0 to < 8.*affected
9.0 to < 9.*affected
10.0 to < 10.*affected
11.0 to < 11.*affected
12.0 to < 12.*affected
13.0 to < 13.*affected
14.0 to < 14.*affected
15.0 to < 15.*affected
16.0 to < 16.*affected
17.0 to < 17.*affected
18.0 to < 18.*affected

CVE-2025-55131

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific tim

Description

Affected products

nodejs node

References